It does its job and looks nice. The application design is also great.
Notifications are a bit obnoxious but they can be disabled.
The integration with smart home systems is super-basic and can't do much, but it's functional even without it and some level of automation can be achieved with IFTTT
It appears to measure critical elements in the air. It must be connected to a WiFi in your home, it can either be plugged in, or connected to common 5 v USB battery pack. No built in rechargeable battery.